Threats / D-Link / CVE-2022-40799
CVE-2022-40799
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
D-Link DNR-322L vulnerability
D-Link DNR-322L contains an integrity check bypass in code download functionality, allowing authenticated attackers to execute arbitrary OS commands.
Verdict
Today item — known-exploited.
Authenticated attackers can exploit missing integrity verification during code downloads to achieve OS-level command execution on affected DNR-322L devices. Products are end-of-life or end-of-service; discontinuation is recommended.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
3 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-08-05).
Probability (EPSS)
EPSS 0.31328 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: D-Link, DNR-322L. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-494 Download Without Integrity Check — weakness family: Path traversal / file.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I authenticate to the device using valid credentials.
Business
Legitimate administrative access is a prerequisite for exploitation.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I initiate a code download without the device verifying file integrity or authenticity.
Business
Lack of cryptographic validation creates the attack surface.
3
Lateral reach — past segmentation narrative 3
Attacker
I supply malicious code that the device accepts and executes at OS level.
Business
Complete device compromise enables data theft, lateral movement, and persistent access.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05